Home / 7,438.32-11,162.34-3,978

Finding the Fourth Proportional to 7,438.32, 11,162.34 and 3,978

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Solution

The fourth proportional to 7,438.32, 11,162.34 and 3,978 is: 5,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,438.32 : 11,162.34 = 3,978 : x
  2. Step 2: Convert to fraction form
    7,438.32/11,162.34 = 3,978/x
  3. Step 3: Cross multiply
    7,438.32x = 11,162.34 × 3,978
  4. Step 4: Simplify right side
    7,438.32x = 44,403,788.52
  5. Step 5: Solve for x
    x = 44,403,788.52/7,438.32
  6. Step 6: Final answer
    x = 5,969.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.